HP 20b HP 20b Calculator Quick Start Guide - Page 22

Algebraic Mode

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Mathematical Calculations For example, to calculate 1+ (2 x 3), you may enter the problem as written from left to right, with parentheses to prioritize the multiplication operation. See Table 2-1 below. Table 2-1 Simple Arithmetic Calculations in Chain Mode Keys 1+ (2*3) Display = Description Sets operational priority, inputs numbers, and multiplies 2 and 3. Adds 1 to 6 and returns 7.00 on the bottom line as the final result. Algebraic Mode To set the calculator in Algebraic mode, refer to the section titled, The Mode Menu: Setting Preferences. In Algebraic mode, multiplication and division have a higher priority than addition and subtraction. For example, in Algebraic mode, pressing 1+2*3 returns a result of 7.00. In Chain mode, the same key presses return a result of 9.00. In Algebraic mode, operations have the following priority: 22

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Mathematical Calculations
22
For example, to calculate 1+ (2 x 3), you may enter the problem as written from
left to right, with parentheses to prioritize the multiplication operation. See Table
2-1 below.
Table 2-1
Simple Arithmetic Calculations in Chain Mode
Keys
Display
Description
1+
(2*3)
Sets operational priority, inputs
numbers, and multiplies 2 and
3.
=
Adds 1 to 6 and returns
7.00
on the bottom line as the final
result.
Algebraic Mode
To set the calculator in Algebraic mode, refer to the section titled,
The Mode
Menu: Setting Preferences.
In Algebraic mode, multiplication and division have a higher priority than addition
and subtraction. For example, in Algebraic mode, pressing
1+2*3
returns a result of
7.00
. In Chain mode, the same key presses return a result of
9.00.
In Algebraic mode, operations have the following priority: